Heater construction



Oct. 8, 1940. J. w. MILLER 2,217,128

- HEATERl CONSTRUCTION Filed May 25, 193B [E7 1 F .J

mmmmmmmmmnijmm mmmmmnmmmummm I /5 .3. INVENTOR v JOHN #WM/LEE ATTORNEY.

Patented Get. 8, 1940 PATENT OFFICE.

HEATER CONSTRUCTION John W. Miller, Lansing, Mich., assigner to Motor Wheel Corporation, Lansing, Mich., a corporation of Michigan Application May 23, 1938, Serial No. 209,414

7 Claims.

This invention relates to heaters, and more particularly to circulating type heaters which consist of an outer casing and a heat chamber within the casing.

It is an object of the invention to provide a heater which may be more conveniently assembled than previous heaters by constructing it in two separate units, which then may be attached together. Another object is to provide a heater Y lo which is exceptionally rigid and in which the weight of the heat `chamber and the burner is carried entirely by the corners of the outer casing. A still further object is to provide a novel means for tightly securing the burner within the heat chamber.

These and other objects ancillary thereto will become more apparent in the following specification when read in connection with the attached drawing which forms a part thereof.

In the drawing;

Figure 1 is a front elevational view of the heater with parts broken away to show the interior construction of the lower portion thereof;

Figure 2 is a cross-sectional view taken on the 25 line 2-2 of Figure 1 and looking in the direction of the arrows;

Figure 3 is a fragmentary sectional view of a A portion of Figure 2 on a much enlarged scale; and

Figure 4 is a cross-sectional view taken on substantially the line 4-4 of Figure 3.

The invention disclosed herein-specically resides in the construction of the outer casing and the supporting means for the burner and for the 35 heat chamber. The drawing shows the invention embodied in a heater of the circulating type.

In general, the heater consists of two assemblies, an outer casing and an inner heat unit. At the corners of the outer casing are four corner o posts II, which are of generally angular crosssection, provided at their edges with lateral ilanges I2. Intermediate the corner posts II are panels I3. Preferably each of these panels I3 is anged about its entire periphery in order to 5 stillen the same and to provide means for securing the panels to the corner posts I I. As will be seen best in Figure 3, the panels I3 have anges I5 at their vertical edges and horizontal flanges I4 on their lower edges. The anges I5 of the 50 panels are joined to the adjacent flanges I2 of the corner posts II by means of bolts I6.

In order to securely brace the corners of the outer casing and to provide supporting members for the inner heater unit it is provided with four 55 obliquely arranged gussets I8. These gussets are of the shape shown in Figure 3, and consist of webs I9,` and flanges 20 and 2| at the edges of the web. The webs I9 of the gussets I8 are riveted to the lower flanges I4 of the adjacent panels I3 respectively by means of rivets 22. The web i9 is notched at 23 and 2t, and the metal of the web which is struck out to form the notches is bent vertically as at and 26 to form ears which are bolted to the adjacent flanges I2 and I5 of the corner posts and side panels.

The outer casing is completed by the addition of a top wall 21 and bottom panels 28. The panels 2B ll in the space between the lower ends of the main panels and the floor on which the heater stands.

The heater unit comprises a heat chamber 29 in which is mounted a pot type burner 30. The burner is not a part of this invention, and may be of any conventional type. Preferably, however, it is provided with a peripheral bead 3| adjacent the upper edge thereof, which seats against a peripheral bead 32 in the heat chamber. Then when the bead 3I is forced against the bead 32 by means to be described presently, an airtight joint will be formed.

Secured to the wall of the heat chamber 29 at four circumferentially spaced points are the legs 33. Each of these legs includes a vertical flange 34 which is attached to the wall of the heat chamber 29 by means of bolts 35. Each leg 33 also includes a vertically and radially extending web 36 and a horizontal flange 31. Preferably each leg is pressed from a single piece of metal. The outer end of the flange 31 is reinforced with a relatively heavy metal plate 38 which may be spot welded thereto. The outer ends of the flanges 31 and the plates 38 are perforated for the reception of bolts 39. The legs 33 are secured to the webs of the gussets 20 by means of the bolts 39 and nuts 40, and constitute the sole support for the heater unit.

In order to securely hold the burner 30 within the heat chamber, a supporting bar 4I is provided. The ends 42 of the bar are of angle shape, as shown best in Figures 1 and 4, and the portion intermediate the angular ends is bowed downwardly, as shown in Figure 1. The bar 4I engages the bottom of the burner 3Ill adjacent the periphery. The ends 42 of the bar 4I are secured to the bottom flanges 31 of two diagonally opposite legs 33 by means of bolts 43 and nuts 44. The bar 4I is resilient and the ends 42 are bent so that they must be distorted in order to seat at against the flange 31. Thus, a resilient support for the burner is provided.

To secure the burner in the heat chamber it is merely necessary to placethe shoulder Il of the burner against the shoulder 32 of the heat chamv ber, then place the bar 4| in the position shown in Figures 1 and 4 and secure the same .to the flanges 3l of the legs 33 by means of Vbolts I3 bled on oneassembly line, and the heater, unit consisting of shell 29, burner 30, legs 33, and bar di may be assembled on another line. The heater unit may be-then inserted in the casing, preferably while `Aboth are inverted, and secured by the four bolts 39 and nuts 40. In factLthis is the preferred method of' assembly. p

It Will also be noted that thesole support for the heater unit Within the casing consists of the four legs 33. There is no need for any bracing of the upper end of the heater as has been considered necessary heretofore. heat chamber 29 may expand at a materially diil'erent rate than the outer casing Without causing distortion of the heat chamber or outer casing.

The scope of the invention is indicated in the appended claims. I

I claim: i

1. A heater comprising an outer shell and an inner shell located within the outer shell, the outer shell including four upright corner posts of angular cross-section having lateral ilangesv at the edges thereof, a plurality of panels intermediate the corner posts, said panels havingv lateral anges cooperating with and secured to the anges on the corner posts, and a plurality of braces rigidly secured to the corner posts and also to the panels at points spaced from their points of connection with the corner posts, and means connecting the inner shell to the braces.

2. A heater comprising an outer shell and an inner shell located within the outer shell, the outer shell including four upright corner posts, and means for connecting the corner posts in spaced relation to each other, the inner shell including a plurality of depending legs, a burner located within the inner shell, and means for supporting the burner Within the shell comprising a bar rigidly secured to the lower edge of the depending legs, and means connecting the legs to Hence, the

forsecuring the ends of the braces to the ad-l jacent panels.

4. A heater cabinet comprising four upright corner posts of angular cross-section having lateral ila'nges at their upright edges, panels intermediate the corner posts, said panels hav-V ing lateral flanges secured to the vcorner post flanges, and braces at each corner, each brace having vertical flangessecured to the ilanges ofthe respective corner posts, and a horizontal web having its ends secured to the adjacent panels.

5. A -heater comprising an outer shell andan inner shell located Within the outer shell, the

outer shell including four upright corner posts,

andmeans including corner braces for connecting the corner posts in spaced relation to each other, the inner shell having a plurality of depending legs, and means for securing said depending legs to the braces, said legs and said securing means i constituting the sole upon the outer shell.

support for the inner shell 6. A heater comprising an outer shell andan inner shell located 'within the outer shell, the`-v outer shell including upright cornerposts, a plurality of panels intermediate the corner posts, and a plurality 4of braces rigidly secured to the corner` posts and to the panels at points spacedfrom their points of connection with the corner posts, and means connecting the inner shell to the braces.

7. A heater comprising an outer shell including upright corner posts and means for connecting the corner posts in spaced relation to each other, said means comprising a plurality of cor` ner braces secured to said corner posts, an inner shell located Within said outer shell, said inner shell having a zplurality of lateral projections adjacent its lower end and means securing said projections to said braces, said projections and securing means constituting the sole support for the inner shell upon the outer shell.

JOHN W. MILLER. 

